A four-poster stone circle features four upright stones standing at the corners of an irregular quadrilateral. The circle may contain more stones, but the four at the corners are the most prominent ones.

In Scotland there are 54 monuments, or traces of monuments, which are or might have been four-poster stone circles, and there are a few in England. They are mostly in Perthshire, with a cluster on the Isle of Arran and scattered ones as far north as Caithness and as far south as Yorkshire.

The list of Scottish four-poster circles is taken from Link but there does seem to be occasional confusion as to which circle is exactly where.

Strathgarry

Templestone

Thorn

Three Kings

Tirinie

The Welton

and some monuments thought at one time to have been four-poster stone circles, but now not regarded as such

Fortingall

Fortingall NN 7446 See Link
The Royal Commission on the Ancient and Historic Monuments of Scotland says, "Before excavation in 1970, sites A and B seemed to be 4-posters from each of which one stone had been removed. Digging revealed that in reality they were sub-rectangular settings of eight stones with the largest stones at the corners."